Partial Linear Transformation Between Frank Xyz Leads Vectorcardiogram and 12-Lead Electrocardiogram Signals



Salehpour N¹ ; Mehridehnavi A² ; Rabbani H² ; Behjati M³ Show Affiliations
Source: Journal of Isfahan Medical School Published:2014

Abstract

Background: Various techniques are used in diagnosing cardiac diseases, one of those is using electrocardiogram tool. In special situations, like ambulatory care and emergency condition, using vectorcardiogram (VCG) regarding its fewer electrodes is much easier and more useful. However, most cardiologists are accustomed to the 12-lead electrocardiogram, even though some of the leads are either nearly aligned with or derived from the others and consequently contain redundant information. The ability to transform from orthogonal 3-lead vectorcardiogram to 12-lead electrocardiogram enables the use of fewer leads for computer visualization, signal analysis and wireless transmission of signals. This can also improve mobility, albeit limited, to the patients. Methods: Vectorcardiogram and electrocardiogram signals used in this study obtained from 50 healthy persons. We presented a statistical approach to transform 3-lead Frank vectorcardiogram to 12-lead electrocardiogram signals and vice versa, based on partial linear transformation (Least Square Method). In addition, our linear transformation function would be compared with Dower and affine transformation function. Findings: For healthy subjects, the partial linear transformation method had different transformation coefficients from other existed methods like Dower and affine ones. Using these new coefficients in partial linear method lead to gain more accurate statistical parameters in calculating the efficiency and accuracy of new method. Conclusion: Regarding the obtained results in this study, electrocardiogram signals derived from vectorcardiogram signals by using our method had more correlation with general electrocardiogram leads than ones derived by using Dower transformation. Therefore, by using this transformation function, achieving to general information of the case’s heart would be possible and useful. © 2014, Isfahan University of Medical Sciences(IUMS). All rights reserved.